Magic in movies and entertainment

What do you think about references to wizardry, sorcery, spells, and magic in storybooks, films, TV shows, and various other forms of entertainment? It seems our children are being bombarded with this, not only in Harry Potter, The Lord of the Rings, and The Hobbit, but even in relatively innocent Disney movies. To complicate matters, our church recently hosted an event featuring a "Christian illusionist." What's your opinion of this kind of thing?